algcvga - Metamath Proof Explorer

	Metamath Proof Explorer		< Previous Next > Nearby theorems
Mirrors > Home > MPE Home > Th. List > algcvga		Structured version Visualization version GIF version

Theorem algcvga 16512

Description: The countdown function 𝐶 remains 0 after 𝑁 steps. (Contributed by Paul Chapman, 22-Jun-2011.)

**Hypotheses**
Ref	Expression
algcvga.1	⊢ 𝐹:𝑆⟶𝑆
algcvga.2	⊢ 𝑅 = seq0((𝐹 ∘ 1^st ), (ℕ₀ × {𝐴}))
algcvga.3	⊢ 𝐶:𝑆⟶ℕ₀
algcvga.4	⊢ (𝑧 ∈ 𝑆 → ((𝐶‘(𝐹‘𝑧)) ≠ 0 → (𝐶‘(𝐹‘𝑧)) < (𝐶‘𝑧)))
algcvga.5	⊢ 𝑁 = (𝐶‘𝐴)

**Assertion**
Ref	Expression
algcvga	⊢ (𝐴 ∈ 𝑆 → (𝐾 ∈ (ℤ_≥‘𝑁) → (𝐶‘(𝑅‘𝐾)) = 0))

Distinct variable groups: 𝑧,𝐶 𝑧,𝐹 𝑧,𝑅 𝑧,𝑆 Allowed substitution hints: 𝐴(𝑧) 𝐾(𝑧) 𝑁(𝑧)

Proof of Theorem algcvga Dummy variables 𝑘 𝑚 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		algcvga.5	. . 3 ⊢ 𝑁 = (𝐶‘𝐴)
2		algcvga.3	. . . 4 ⊢ 𝐶:𝑆⟶ℕ₀
3	2	ffvelcdmi 7082	. . 3 ⊢ (𝐴 ∈ 𝑆 → (𝐶‘𝐴) ∈ ℕ₀)
4	1, 3	eqeltrid 2837	. 2 ⊢ (𝐴 ∈ 𝑆 → 𝑁 ∈ ℕ₀)
5		nn0z 12579	. . . 4 ⊢ (𝑁 ∈ ℕ₀ → 𝑁 ∈ ℤ)
6		eluz1 12822	. . . . 5 ⊢ (𝑁 ∈ ℤ → (𝐾 ∈ (ℤ_≥‘𝑁) ↔ (𝐾 ∈ ℤ ∧ 𝑁 ≤ 𝐾)))
7		2fveq3 6893	. . . . . . . . 9 ⊢ (𝑚 = 𝑁 → (𝐶‘(𝑅‘𝑚)) = (𝐶‘(𝑅‘𝑁)))
8	7	eqeq1d 2734	. . . . . . . 8 ⊢ (𝑚 = 𝑁 → ((𝐶‘(𝑅‘𝑚)) = 0 ↔ (𝐶‘(𝑅‘𝑁)) = 0))
9	8	imbi2d 340	. . . . . . 7 ⊢ (𝑚 = 𝑁 → ((𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝑚)) = 0) ↔ (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝑁)) = 0)))
10		2fveq3 6893	. . . . . . . . 9 ⊢ (𝑚 = 𝑘 → (𝐶‘(𝑅‘𝑚)) = (𝐶‘(𝑅‘𝑘)))
11	10	eqeq1d 2734	. . . . . . . 8 ⊢ (𝑚 = 𝑘 → ((𝐶‘(𝑅‘𝑚)) = 0 ↔ (𝐶‘(𝑅‘𝑘)) = 0))
12	11	imbi2d 340	. . . . . . 7 ⊢ (𝑚 = 𝑘 → ((𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝑚)) = 0) ↔ (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝑘)) = 0)))
13		2fveq3 6893	. . . . . . . . 9 ⊢ (𝑚 = (𝑘 + 1) → (𝐶‘(𝑅‘𝑚)) = (𝐶‘(𝑅‘(𝑘 + 1))))
14	13	eqeq1d 2734	. . . . . . . 8 ⊢ (𝑚 = (𝑘 + 1) → ((𝐶‘(𝑅‘𝑚)) = 0 ↔ (𝐶‘(𝑅‘(𝑘 + 1))) = 0))
15	14	imbi2d 340	. . . . . . 7 ⊢ (𝑚 = (𝑘 + 1) → ((𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝑚)) = 0) ↔ (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘(𝑘 + 1))) = 0)))
16		2fveq3 6893	. . . . . . . . 9 ⊢ (𝑚 = 𝐾 → (𝐶‘(𝑅‘𝑚)) = (𝐶‘(𝑅‘𝐾)))
17	16	eqeq1d 2734	. . . . . . . 8 ⊢ (𝑚 = 𝐾 → ((𝐶‘(𝑅‘𝑚)) = 0 ↔ (𝐶‘(𝑅‘𝐾)) = 0))
18	17	imbi2d 340	. . . . . . 7 ⊢ (𝑚 = 𝐾 → ((𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝑚)) = 0) ↔ (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝐾)) = 0)))
19		algcvga.1	. . . . . . . . 9 ⊢ 𝐹:𝑆⟶𝑆
20		algcvga.2	. . . . . . . . 9 ⊢ 𝑅 = seq0((𝐹 ∘ 1^st ), (ℕ₀ × {𝐴}))
21		algcvga.4	. . . . . . . . 9 ⊢ (𝑧 ∈ 𝑆 → ((𝐶‘(𝐹‘𝑧)) ≠ 0 → (𝐶‘(𝐹‘𝑧)) < (𝐶‘𝑧)))
22	19, 20, 2, 21, 1	algcvg 16509	. . . . . . . 8 ⊢ (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝑁)) = 0)
23	22	a1i 11	. . . . . . 7 ⊢ (𝑁 ∈ ℤ → (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝑁)) = 0))
24		nn0ge0 12493	. . . . . . . . . . . . . . . . 17 ⊢ (𝑁 ∈ ℕ₀ → 0 ≤ 𝑁)
25	24	adantr 481	. . . . . . . . . . . . . . . 16 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑘 ∈ ℤ) → 0 ≤ 𝑁)
26		0re 11212	. . . . . . . . . . . . . . . . 17 ⊢ 0 ∈ ℝ
27		nn0re 12477	. . . . . . . . . . . . . . . . 17 ⊢ (𝑁 ∈ ℕ₀ → 𝑁 ∈ ℝ)
28		zre 12558	. . . . . . . . . . . . . . . . 17 ⊢ (𝑘 ∈ ℤ → 𝑘 ∈ ℝ)
29		letr 11304	. . . . . . . . . . . . . . . . 17 ⊢ ((0 ∈ ℝ ∧ 𝑁 ∈ ℝ ∧ 𝑘 ∈ ℝ) → ((0 ≤ 𝑁 ∧ 𝑁 ≤ 𝑘) → 0 ≤ 𝑘))
30	26, 27, 28, 29	mp3an3an 1467	. . . . . . . . . . . . . . . 16 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑘 ∈ ℤ) → ((0 ≤ 𝑁 ∧ 𝑁 ≤ 𝑘) → 0 ≤ 𝑘))
31	25, 30	mpand 693	. . . . . . . . . . . . . . 15 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑘 ∈ ℤ) → (𝑁 ≤ 𝑘 → 0 ≤ 𝑘))
32		elnn0z 12567	. . . . . . . . . . . . . . . . 17 ⊢ (𝑘 ∈ ℕ₀ ↔ (𝑘 ∈ ℤ ∧ 0 ≤ 𝑘))
33	32	simplbi2 501	. . . . . . . . . . . . . . . 16 ⊢ (𝑘 ∈ ℤ → (0 ≤ 𝑘 → 𝑘 ∈ ℕ₀))
34	33	adantl 482	. . . . . . . . . . . . . . 15 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑘 ∈ ℤ) → (0 ≤ 𝑘 → 𝑘 ∈ ℕ₀))
35	31, 34	syld 47	. . . . . . . . . . . . . 14 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑘 ∈ ℤ) → (𝑁 ≤ 𝑘 → 𝑘 ∈ ℕ₀))
36	4, 35	sylan 580	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ 𝑆 ∧ 𝑘 ∈ ℤ) → (𝑁 ≤ 𝑘 → 𝑘 ∈ ℕ₀))
37	36	impr 455	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ 𝑆 ∧ (𝑘 ∈ ℤ ∧ 𝑁 ≤ 𝑘)) → 𝑘 ∈ ℕ₀)
38	37	expcom 414	. . . . . . . . . . 11 ⊢ ((𝑘 ∈ ℤ ∧ 𝑁 ≤ 𝑘) → (𝐴 ∈ 𝑆 → 𝑘 ∈ ℕ₀))
39	38	3adant1 1130	. . . . . . . . . 10 ⊢ ((𝑁 ∈ ℤ ∧ 𝑘 ∈ ℤ ∧ 𝑁 ≤ 𝑘) → (𝐴 ∈ 𝑆 → 𝑘 ∈ ℕ₀))
40	39	ancld 551	. . . . . . . . 9 ⊢ ((𝑁 ∈ ℤ ∧ 𝑘 ∈ ℤ ∧ 𝑁 ≤ 𝑘) → (𝐴 ∈ 𝑆 → (𝐴 ∈ 𝑆 ∧ 𝑘 ∈ ℕ₀)))
41		nn0uz 12860	. . . . . . . . . . . . 13 ⊢ ℕ₀ = (ℤ_≥‘0)
42		0zd 12566	. . . . . . . . . . . . 13 ⊢ (𝐴 ∈ 𝑆 → 0 ∈ ℤ)
43		id 22	. . . . . . . . . . . . 13 ⊢ (𝐴 ∈ 𝑆 → 𝐴 ∈ 𝑆)
44	19	a1i 11	. . . . . . . . . . . . 13 ⊢ (𝐴 ∈ 𝑆 → 𝐹:𝑆⟶𝑆)
45	41, 20, 42, 43, 44	algrf 16506	. . . . . . . . . . . 12 ⊢ (𝐴 ∈ 𝑆 → 𝑅:ℕ₀⟶𝑆)
46	45	ffvelcdmda 7083	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ 𝑆 ∧ 𝑘 ∈ ℕ₀) → (𝑅‘𝑘) ∈ 𝑆)
47		2fveq3 6893	. . . . . . . . . . . . . . 15 ⊢ (𝑧 = (𝑅‘𝑘) → (𝐶‘(𝐹‘𝑧)) = (𝐶‘(𝐹‘(𝑅‘𝑘))))
48	47	neeq1d 3000	. . . . . . . . . . . . . 14 ⊢ (𝑧 = (𝑅‘𝑘) → ((𝐶‘(𝐹‘𝑧)) ≠ 0 ↔ (𝐶‘(𝐹‘(𝑅‘𝑘))) ≠ 0))
49		fveq2 6888	. . . . . . . . . . . . . . 15 ⊢ (𝑧 = (𝑅‘𝑘) → (𝐶‘𝑧) = (𝐶‘(𝑅‘𝑘)))
50	47, 49	breq12d 5160	. . . . . . . . . . . . . 14 ⊢ (𝑧 = (𝑅‘𝑘) → ((𝐶‘(𝐹‘𝑧)) < (𝐶‘𝑧) ↔ (𝐶‘(𝐹‘(𝑅‘𝑘))) < (𝐶‘(𝑅‘𝑘))))
51	48, 50	imbi12d 344	. . . . . . . . . . . . 13 ⊢ (𝑧 = (𝑅‘𝑘) → (((𝐶‘(𝐹‘𝑧)) ≠ 0 → (𝐶‘(𝐹‘𝑧)) < (𝐶‘𝑧)) ↔ ((𝐶‘(𝐹‘(𝑅‘𝑘))) ≠ 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) < (𝐶‘(𝑅‘𝑘)))))
52	51, 21	vtoclga 3565	. . . . . . . . . . . 12 ⊢ ((𝑅‘𝑘) ∈ 𝑆 → ((𝐶‘(𝐹‘(𝑅‘𝑘))) ≠ 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) < (𝐶‘(𝑅‘𝑘))))
53	19, 2	algcvgb 16511	. . . . . . . . . . . . 13 ⊢ ((𝑅‘𝑘) ∈ 𝑆 → (((𝐶‘(𝐹‘(𝑅‘𝑘))) ≠ 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) < (𝐶‘(𝑅‘𝑘))) ↔ (((𝐶‘(𝑅‘𝑘)) ≠ 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) < (𝐶‘(𝑅‘𝑘))) ∧ ((𝐶‘(𝑅‘𝑘)) = 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) = 0))))
54		simpr 485	. . . . . . . . . . . . 13 ⊢ ((((𝐶‘(𝑅‘𝑘)) ≠ 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) < (𝐶‘(𝑅‘𝑘))) ∧ ((𝐶‘(𝑅‘𝑘)) = 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) = 0)) → ((𝐶‘(𝑅‘𝑘)) = 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) = 0))
55	53, 54	syl6bi 252	. . . . . . . . . . . 12 ⊢ ((𝑅‘𝑘) ∈ 𝑆 → (((𝐶‘(𝐹‘(𝑅‘𝑘))) ≠ 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) < (𝐶‘(𝑅‘𝑘))) → ((𝐶‘(𝑅‘𝑘)) = 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) = 0)))
56	52, 55	mpd 15	. . . . . . . . . . 11 ⊢ ((𝑅‘𝑘) ∈ 𝑆 → ((𝐶‘(𝑅‘𝑘)) = 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) = 0))
57	46, 56	syl 17	. . . . . . . . . 10 ⊢ ((𝐴 ∈ 𝑆 ∧ 𝑘 ∈ ℕ₀) → ((𝐶‘(𝑅‘𝑘)) = 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) = 0))
58	41, 20, 42, 43, 44	algrp1 16507	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ 𝑆 ∧ 𝑘 ∈ ℕ₀) → (𝑅‘(𝑘 + 1)) = (𝐹‘(𝑅‘𝑘)))
59	58	fveqeq2d 6896	. . . . . . . . . 10 ⊢ ((𝐴 ∈ 𝑆 ∧ 𝑘 ∈ ℕ₀) → ((𝐶‘(𝑅‘(𝑘 + 1))) = 0 ↔ (𝐶‘(𝐹‘(𝑅‘𝑘))) = 0))
60	57, 59	sylibrd 258	. . . . . . . . 9 ⊢ ((𝐴 ∈ 𝑆 ∧ 𝑘 ∈ ℕ₀) → ((𝐶‘(𝑅‘𝑘)) = 0 → (𝐶‘(𝑅‘(𝑘 + 1))) = 0))
61	40, 60	syl6 35	. . . . . . . 8 ⊢ ((𝑁 ∈ ℤ ∧ 𝑘 ∈ ℤ ∧ 𝑁 ≤ 𝑘) → (𝐴 ∈ 𝑆 → ((𝐶‘(𝑅‘𝑘)) = 0 → (𝐶‘(𝑅‘(𝑘 + 1))) = 0)))
62	61	a2d 29	. . . . . . 7 ⊢ ((𝑁 ∈ ℤ ∧ 𝑘 ∈ ℤ ∧ 𝑁 ≤ 𝑘) → ((𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝑘)) = 0) → (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘(𝑘 + 1))) = 0)))
63	9, 12, 15, 18, 23, 62	uzind 12650	. . . . . 6 ⊢ ((𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ ∧ 𝑁 ≤ 𝐾) → (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝐾)) = 0))
64	63	3expib 1122	. . . . 5 ⊢ (𝑁 ∈ ℤ → ((𝐾 ∈ ℤ ∧ 𝑁 ≤ 𝐾) → (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝐾)) = 0)))
65	6, 64	sylbid 239	. . . 4 ⊢ (𝑁 ∈ ℤ → (𝐾 ∈ (ℤ_≥‘𝑁) → (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝐾)) = 0)))
66	5, 65	syl 17	. . 3 ⊢ (𝑁 ∈ ℕ₀ → (𝐾 ∈ (ℤ_≥‘𝑁) → (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝐾)) = 0)))
67	66	com3r 87	. 2 ⊢ (𝐴 ∈ 𝑆 → (𝑁 ∈ ℕ₀ → (𝐾 ∈ (ℤ_≥‘𝑁) → (𝐶‘(𝑅‘𝐾)) = 0)))
68	4, 67	mpd 15	1 ⊢ (𝐴 ∈ 𝑆 → (𝐾 ∈ (ℤ_≥‘𝑁) → (𝐶‘(𝑅‘𝐾)) = 0))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 396 ∧ w3a 1087 = wceq 1541 ∈ wcel 2106 ≠ wne 2940 {csn 4627 class class class wbr 5147 × cxp 5673 ∘ ccom 5679 ⟶wf 6536 ‘cfv 6540 (class class class)co 7405 1^st c1st 7969 ℝcr 11105 0cc0 11106 1c1 11107 + caddc 11109 < clt 11244 ≤ cle 11245 ℕ₀cn0 12468 ℤcz 12554 ℤ_≥cuz 12818 seqcseq 13962

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2703 ax-sep 5298 ax-nul 5305 ax-pow 5362 ax-pr 5426 ax-un 7721 ax-cnex 11162 ax-resscn 11163 ax-1cn 11164 ax-icn 11165 ax-addcl 11166 ax-addrcl 11167 ax-mulcl 11168 ax-mulrcl 11169 ax-mulcom 11170 ax-addass 11171 ax-mulass 11172 ax-distr 11173 ax-i2m1 11174 ax-1ne0 11175 ax-1rid 11176 ax-rnegex 11177 ax-rrecex 11178 ax-cnre 11179 ax-pre-lttri 11180 ax-pre-lttrn 11181 ax-pre-ltadd 11182 ax-pre-mulgt0 11183

This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2534 df-eu 2563 df-clab 2710 df-cleq 2724 df-clel 2810 df-nfc 2885 df-ne 2941 df-nel 3047 df-ral 3062 df-rex 3071 df-reu 3377 df-rab 3433 df-v 3476 df-sbc 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-pss 3966 df-nul 4322 df-if 4528 df-pw 4603 df-sn 4628 df-pr 4630 df-op 4634 df-uni 4908 df-iun 4998 df-br 5148 df-opab 5210 df-mpt 5231 df-tr 5265 df-id 5573 df-eprel 5579 df-po 5587 df-so 5588 df-fr 5630 df-we 5632 df-xp 5681 df-rel 5682 df-cnv 5683 df-co 5684 df-dm 5685 df-rn 5686 df-res 5687 df-ima 5688 df-pred 6297 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6492 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-riota 7361 df-ov 7408 df-oprab 7409 df-mpo 7410 df-om 7852 df-1st 7971 df-2nd 7972 df-frecs 8262 df-wrecs 8293 df-recs 8367 df-rdg 8406 df-er 8699 df-en 8936 df-dom 8937 df-sdom 8938 df-pnf 11246 df-mnf 11247 df-xr 11248 df-ltxr 11249 df-le 11250 df-sub 11442 df-neg 11443 df-nn 12209 df-n0 12469 df-z 12555 df-uz 12819 df-fz 13481 df-seq 13963

This theorem is referenced by: algfx 16513 eucalgcvga 16519

W3C validator